MM flow in SAP with t-codes and tables

Material requirement are identified either by the user, department or via
material planning and control. For example a MRP Run in production planning or
material falling short of reorder-point can automatically generate Purchase
Requisition. At the same time PR can be created manually in the system.

2. Source Determination - RFQ (ME41)

Identify the possible source of supply based on the past order and existing long
term purchase contract. Then create Request for Quotation, which can be then
sent electronically to vendors.

3. Vendor Selection and Comparison of Quotation (ME49)

After receiving quotation system is capable to simulate pricing scenarios,
allowing user to compare number of quotations and sent rejection letter automatically.

4. Purchase Order (ME21N)

Data from Quotation or Purchase Requisition can be adopted to create Purchase
Orders. Purchase Order is then sent to Vendor to supply the goods.

5. Purchase Order Follow ups ME91, ME91F, ME92F

Reminder can be sent to vendors at predefined intervals.

6. Goods Receipts (MB01)

Goods were received.

7. Invoice Verification (MIRO)

Along with the goods vendor also submits Invoice, system verifies then invoice
against the quantity received and PO data. The account payable clerk is
notified.